Question about 1994 Buick Park Avenue

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Cylinder misfire coil

I thought the coils in my Buick (3800)were bad cause #3 was firing intermittently. So I changed the #2 coil with the #3 coil and also changed the igniter. I worked for a day the started missing again. Tested #3 coil and was getting NO spark! Switched #3 with #2 and everything started working again. U think the contact points on these coils need cleaning?

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  • Buick Master
  • 808 Answers

These engines have 3 coils and are paired 1 and 4 2 and 5 3 and 6 with a spark noid run to see if the paired cylinder has no spark if so remove coil from module and test the power supply to coil and with a logic probe test the trigger side if blinking with no spark your coil is bad. not blinking replace module.

Posted on Apr 20, 2014

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Posted on Jan 02, 2017

  • 491 Answers

SOURCE: one of the 3 ignition coils not firing. engine run

Most likely the ignition module the coils sit on is not firing that coil.....a 90% chance.
Instead of changing the coil......just change position of the coil on the module to check this.
After you get it running good......change the crank pickup....they should be changed on every tune up on the 3.8......

Posted on Aug 25, 2009

GM Elec
  • 1000 Answers

SOURCE: Car Misses after replacing the coils and spark plugs

Has the service engine light come on? If so, have the codes pulled and it will narrow down the cylinder that is causing the problem.
If no service engine light, have you narrowed it down to one cylinder or is it random.
Let me know and we will go from there.
Regards,

Posted on Mar 27, 2009

wireguy212
  • 1627 Answers

SOURCE: 1993 buick park avenue ignition spark issue.....my

the problem has to be wireing.checking with an ohm meter will not tell you for sure how much current the wier will carry so you need need to find where it starts and ends and disconnect bothe ends.put a jumper to ground in one end then hook a test light to your positive battery terminal,put in the other end of the harness and see if the light is bright or dim.

Posted on Jul 30, 2009

Testimonial: "good and fast response "

  • 45 Answers

SOURCE: my 1998 buick park avenue ultra has no ignition

You will have to change the sencer to see,but i had once the same problem and in the wiering harness underneat the radiator i found a brocken wire all coroded.That did fix the problem.good luck.

Posted on Jan 07, 2011

  • 1 Answer

SOURCE: 1995 buick... steadily misses..

Had same problem,new coil packs did the job!

Posted on Apr 12, 2012

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Replaced coil pack on 3800 pontiac bonneville and its still missing what now?


First you need to determine what type of miss you have. Is it random on all cylinders, or is it restricted to one or two cylinders? Random misfire can be caused by crank or cam sensors that are starting to give out. Single cylinder misfires can be due to plugs, wires, coils (you already addressed those), as well as internal issues such as burnt or broken valves.

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What is the Wire Order with distributor?


theres no distributor and the firing order for your 3.8 is 1-6-5-4-3-2-the following link shows the coil pack
Buick General Motor 3800 V6 Engine Firing Order DIS IDI ignition timing 3.8 Buick Engine Coil Pack Firing Order Spark Plug Wire Location Which way do the spark plug wires go on & what cylinder is what?
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Firing order:
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How do I determine what is causing power loss when it can be multiple issues?


U need a new coil. They wear out from heat and age. Also bad plugs put strain on it cause they draw to much currant

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What do I need done if codes p0171 p0174 p0301 p0305 p0316 is it major problems


OK, We'll cover the Diagnostic Test Codes (DTCs), starting with the standard definition set by SAE J2012 (Revised December 2007)
DTC P0171 "System Too Lean Bank 1"
DTC P0174 "System Too Lean Bank 2"
DTC P0301 "Cylinder 1 Misfire Detected"
DTC P0305 "Cylinder 5 Misfire Detected"
DTC P0316 "Engine Misfire Detected on Startup (First 1000 Revolutions)"

The "system lean" codes are pretty much telling you that there is way too much oxygen in the exhaust. There is too much oxygen on BOTH sides of the engine, and that is why you are getting codes for bank 1 and for bank 2. Bank 1 is the side where #1 cykinder is located and Bank 2 is the opposite side.

The misfire codes are pretty self-explanatory. #1 and # 5 cylinders are misfiring. The P0316 DTC is telling you that the misfire monitor is detecting a misfire as soon as the engine starts. This tells you that it is a very severe misfire and that the engine does not have to warm up and the car does not have to be driven to detect the misfire.

A misfire can be caused by many things it can be vacuum leaks, bad spark plugs, bad ignition cables, faulty ignition coils, fouled or malfunctioning injectors or injector circuits, blown head gasket, cracked cylinder head, burnt valves, etc.. etc..

However, look at the codes you have. Then look at the firing order for your engine. 2002 Mercury Sable is only equipped with a 3.0L 2V 6-cylinder engine.
The firing order is 1-4-2-5-3-6

Now if you take the firing order and split it in half, stack the two halves on top of each other, it looks like this:
1-4-2
5-3-6

When you look at the firing order this way, you can see that cylinders 1 an 5, 4 and 3, and 2 and 6, are "PAIRED" cylinders. They are exacly opposite in the firing order. Now, the cylinder only fires every second revolution of the crankshaft. With paired cylinders, one of the cylinders in the pair will fire on the first revolution and the other cylinder will fire on the second revolution.

Looking back at your codes, please note that the cylinders that are setting the misfire codes are paired cylinders.

Now the coil pack for your ignition is actually made up of three coils. Each coil fires a set of paired cylinders. If you look at the top of the coil, it will usually be marked with the cylinder numbers that each coil tower is supposed to connect to. The coil will look just like the firing order split and stacked as above.

With all of this said, I would say that it is VERY LIKELY that your misfire codes are being caused by a defective ignition coil.

The lean codes are a little different.

These are USUALLY caused by vacuum leaks which allow too much air into the engine that is not getting measured by the Mass Airflow (MAF) sensor and causes the engine to be getting too much air and not enough fuel (running lean).

I would take a good look at all of the vacuum hoses and lines. Ford is notorious for getting holes in the rubber parts that connect the PCV tubes.

If you do not find any obvious reasons for a vacuum leak, then you may want to fix the misfire codes, reset the computer memory, and drive the vehicle to see if the lean codes come back again. The misfires COULD be the cause of the lean codes. In a perfect world, this is not supposed to happen because the misfire monitors setting codes will not allow the oxygen sensor monitors to run and set lean codes. However, I HAVE seen cylinder misfires that have caused lean codes.

I hope this helps you to figure it out. Good luck!

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1 Answer

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alot of times the coil goes bad and kills the driver for the cylinder, remove the plug wire from that coil and see if it has spark if it does then my next step would be to do a compression test on #2 cylinder to make sure its not a mechainical problem. if the compression is good then check for vacuum leaks around that cylinders intake port and last is to make sure the firing order is right.the last thing would be to swap that injector with another cylinder and see if the misfire moves.good day.

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